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Finding the Fourth Proportional to 88,728.10, 133,092.15 and 87,270.10

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Solution

The fourth proportional to 88,728.10, 133,092.15 and 87,270.10 is: 130,905.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,728.10 : 133,092.15 = 87,270.10 : x
  2. Step 2: Convert to fraction form
    88,728.10/133,092.15 = 87,270.10/x
  3. Step 3: Cross multiply
    88,728.10x = 133,092.15 × 87,270.10
  4. Step 4: Simplify right side
    88,728.10x = 11,614,965,239.72
  5. Step 5: Solve for x
    x = 11,614,965,239.72/88,728.10
  6. Step 6: Final answer
    x = 130,905.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.